Automatic stop-motion for yarn-spinning machines.



W. KOZLOWSKI.

AUTOMATIC STOP MOTION FOR YARN SPINNING MACHINES. APPLICATION FILED JAN 5. I912. RENEWED MAY 1. 1914.

1,21%??8. I Patented Jan. 2, 1917.

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W. KOZLOWSKI.

AUTOMATIC STOP MOTION FOR YARN SPINNING MACHINES;

APPLICATION FILED JAN- 5. m2. RENEWED MAY 1. 1914.

1,21 1 ,1 78. Patenfed Jan. 2; 1917.

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AUTOMATIC STOP MOTION FOR YARN SPINNING MACHINES.

APPLICATION FILED JAN- 5. m2. RENEWED MAY 1. 1914.

1,21 1,178, I Patented Jan. 2,1917.

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W. KOZLOWSKI.

AUTOMATIC STOP MOTION FOR YARN SPINNING MACHINES.

APPLICATION FILED JAN. 5. 1912. RENEWED MAY 1. 1914.

W. KOZLOWSKI.

AUTOMATIC STOP MOTION FOR YARN SPINNING MACHINES.

APPLICATION FILED mus. 1912. RENEWED MAY 1. 1914.

1,211,178. I Patented Jan. 2, 1917.

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a v. v 7 g i AUTOMATIC STOP-MOTION FOR YARN-SPINNING MACHINES.

Specification of Letters Patent.

Application filed January 5, 1912, Serial No. 669,633. Renewed May 7, 1914. Serial No.' 837,073.

To all whom it may concern:

Be it known that I, WVLADYsLAw KozLow- SKI, engineer, residing at No.49 Jerozolimska street, Varsawe Russia, have invented certain new and useful Improvements in Automatic Stop-Motions for Yarn-Spinning Machines; and I do hereby declare the following to be a 'full, clear,'and exact description of the invention, such as will enable others skilled in the art to which'it appertains to make and use the same.

The present invention is a device for automatically stopping the movement of the thread at its breaking off in twisting and other spinning machines. It differs from present devices in that the stopping of the thread is obtained without any action by the feed rollers, but exclusively by fixing the threads upon the parts placed before the feed rollers. Such a device differs substan tially from the devices wherein the stopping of the movement of the thread is performed by thrusting a fork between the rollers, 2'. e.

* by stopping the rotation of the rollers. The 25 device last mentioned has the disadvantage that the fork damages the faces of the rollers.

lVith the present invention the feed rollers continue rotating, after breaking off the thread, and so actuates bymeans of a weight or lever suspended on it, a mechanism, which causes the fixing of the threads between two faces.

The present invention can be applied to any dry or wet twistingmachine and consists substantially in the fact that the thread being strained during its passage through the machine keeps a lever or weight out of balance and when the thread has been broken 0E said lever or weight is released and, on descending, actuates two clamping surfaces, the jaws of the .pincers, to hold the thread.v

The present invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the device partly cut away, asapplied to the wet twisting machines for a few threads. Fig. 2 is a plan view of the same. Fig. 3 is a side view of the device the thread having been broken 05 just before passing the feed rollers. Fig. 4 is a view of the same but after the breaking of the thread has occurred, after passing the feed rollers. Fig. 5 shows a cross section of the jaws of the pincers, on an enlarged scale, as applied to twisting machines for only two threads. Fig. 6 is a side elevation of the device after the thread has broken and showing a front view of the jaws and thread guide. Fig. 7, is a side View of the device shown in Fig. 6, immediately after the breaking of the threads. Fig. 8 is a side view, partly cut away, of a modified device as applied to the so called Scottish wet twisting machines. Fig. 9 is aplan of the same, the spool being removed, and Fig. 10 is a side View of the same, the threads having just been broken off.

In Figs. 1 to l is shown an appliance for four threads, but, of course, it can be constructed also for less or more threads. The whole device is mounted in the box 8, which is secured close to the beam 10 of the frame 11 of the rollers12 and 13 by means of the hook shaped part 9, which may be fixed to the beam 10, with a bolt. The roller 12 is driven by gearing and the-roller 13 is carried with itto rotate only by the friction between them. There are four spools 14 from which the threads wind off. The

rollers 16 are placed in the water trough 15, the threads pass freely upon the guide 31 between the jaws 17 and 17' of the open pincers, then through the eyes 18 of the weights l9 suspended upon said threads, and thereafter around the rollers 13 and 12 in the direction as shown in the figure and pass thehook 20 of the lever 21. Said lever 21 can swing upon the shaft 22 whereby the right short end 21 of the lever can engage the pin 23 of the latch or pawl 24 which is constructed as a double armed lever adapted to swing on the shaft 25. The left enlarged end24 of the latch is situated below the weights 19, which slide in the guides 19 and the right endof said pawl is hookshaped in order to engage the hook 26 of the double armed bent lever 27 adapted to swing on the shaft 28. The lower arm of the lever 27 is actuatedby the spring 29 which drives the wedge shaped upper arm of said lever between the lever arms of the jaws 17 and 17, where the broken thread is held by the jaws As long as the thread is not broken off it is prevented from being fixed by means of said latch 24, which retains'the lever 27 in the desired position.

The jaw 17 of the pincers is made fixed, but the jaw 17 is adapted to swing on the shaft 30. The upper end of this jaw acts as Patented J an. 2, 1917.

a counter-balance by the help of which the swinging jaw is held back from the fixed one in order to permit free passing of the threads. The direction of the movement of the threads is shown in Fig.1, by means of arrows. In order to fix the threads in case of their breaking off at the jaws, the working faces of the jaws should be cross hatched with broken lines. See 5 in an enlarged scale.) The jaws having come in contact, the threads will engage said lines and thus be kept securely in 'place independently of the rotating of the speed rolls.

The upper ends of the weights 19 provided with the eyes can be pivoted to their remaining parts with frictional resistance against motion. The weights being constructed as above, their eye shaped upper parts can be fixed at right angles to t re remaining parts of said weights to put out of action some of them, when working with a less number of threads than four.

Suppose one of the threads has been broken before reaching the feed rollers, (Fig. 3), the weight 19 drops and strikes the latch 24, whereby the hook-shaped right end of said latch will come out of mesh with the hook 26 of the lever 27 and thus release it. The wedge shaped part 27 of the lever will then be driven by the action of the spring 29 between the lower ends of the pincers or jaws 17 and 17 producing in this Way a certain stoppage of the threads between the jaws. If the threads are broken off after having passed the free roller (Fig. 4) the left end of the lever 21 supported by the thread will fall down and put the latch 24 out of mesh with the lever 27 by the action of its right end upon said latch, thatis, it will cause the aws 17 and 17 to catch hold of the threads. The returning of the latch 24 and weights 19 into the starting position will be obtained by raising the left end of the lever 21 (Fig. 4). The curved part 21 of the lever takes up then the left arm of the latch 24 the enlarged end of which lifts up the weights l9 whereat the hookedshaped arm of the latch will again engage the hook 26 of the lever 27.

It should be noticed that the disengaging of latch 24 and the lever 27 takes place only when the weight 19 or the lever 21 drops rapidly. When the thread drops or its tension is lowered the disengaging of the latch 24 and the lever 27 does not take place, as in this case neither the weight nor the lever can fall down with full speed.

Figs. 6 and 7 represent the device as applied to machines with only two threads. The use of the weights 19 is in this case unnecessary, since with these machines the breaking off of one thread causes unavoidably the breaking of the other thread, both threads break off almost simultaneously. Analogous parts are marked in these figures with the same signs as in the foregoing ones, the difference between this device and the former consists in that the latch 24 is con-- structed in this case as a single armed lever adapted to swing on the shaft The returning of the device to starting position is caused by raising lever 21, said lever however, does not actuate the latch 24, as before,

but pushes with its nose 21 the lower arm of the curved lever 27 turning it through such an angle that latch 24 falls under the action of its own weight and engages the nose26 of the lever 27. 31 and 31 mark the guides of the threads.

In Figs. 8, 9 and 10 is shown the device as adapted to the Scottish wet twisting inachines. WVith these machines the threads of the spools 14 pass immediately around the roller 12, and plunge partly into the fluid trough 15. The rollers 12 and 13 are carried by the shaft 32 j ournaled in the stands 11, by turning said shaft 32, the whole set of rollers will be lifted up in order to prepare the trough 15 for cleaning. Analogous parts are marked in both these and foregoing figures with the same sign. The last device differs from the former one herein that'the lever 21 with the eye 20 is located in this case above the rollers 12 and 13 and is operated by the balance 21. When the threads are broken off, the lever 21, Fig. 8 is turned back to the right, by the action of the balance 21, Fig. 10 and having struck with its lower arm 21 against the tail end of the latch 24 disengages said latch from the pin 26 of the lever 27, the wedged shaped part 27 is driven by the action of the spring 29 between the arms of the jaws 17 and 17 and so fixes the threads. The returning of the device to the starting position will be obtained by rotating the lever 21 to the left Fig. 10.

The applying of the devices as above set forth prevents the formation of wastes because the thread being fixed with the aws m as soon as it has been broken off cannot wind up on the feed rollers.

Besides applying the present device there is eliminated the necessity of a separate process of doubling the threads. As one thread being broken off when many of them are twisted it is necessary to stop also the spindle, so in the device shown in Figs. 1 to 4, the jaws moving to fix the thread broken off can simultaneously stop the spindle by means of a suitable transmission. The necessary driving force may be furnished with the spring 29.

Havin thus fully described my invention, what I claim is:

1. In a stop motion for yarn spinning machines, thread supporting means, guides directing said threads, pincers adjacent said guides to grip said threads, weights having eyes through which said threads pass, a detector having a terminal hook on its longer arm engaging said thread and its shorter arm engaging a pin on a latch, said latch adapted at one end to be depressed by said Weight and at its other end to release a spring-operated, bent lever, carrying a wedge to actuate said pincers to grip said threads, for the purpose specified.

2. In a stop motion mechanism for yarn spinning machines, thread supporting means, guides directing the threads from said means, pincers adjacent said guides to grip said. threads, weighted thread guides having eyes through which said threads pass, said rollers carrying said threads between them, a pivoted detector actuating a latch, said latch releasing a spring operated lever carrying a wedge to operate said pincers, on the breaking of a thread.

3. In a stop motion for yarn spinning machines, thread supporting means, guides directing the threads from said means, pincers adjacent said guides to grip said threads, a detector carrying said threads on its longer arm, a latch engaged by its shorter arm means to depress one end of said latch, a lever releasable by the other end of said latch and a wedge carried by said lever to cause said pincers to grip said threads, as specified.

4:. In a stop motion for twisting and spinning machines or the like, thread supporting means, guides directing said threads, normally opened pincers adjacent said guides to grip said threads when broken, a substantially closed box, a detector projecting from the box, the latter containing a spring influenced lever provided with means to actuate the pincers, a latch normally retaining the lever, means for releasing the latch by the swinging movement of the de tector, and means for restablishing the normal position of the spring influenced lever and looking it by the returning movement of the said detector.

. the said detector abutting by its returning movement against the second arm and forcing thereby the latch against and in engagement with the spring influenced lever.

6. In a stop motion for twisting and spinning machines or the like, thread supporting means, guides directing said threads,

normally opened pincers adjacent said guides to grip said threads when broken, a substantially closed box, a detector projecting from the box, the latter containing a spring influenced lever provided with means to actuate the pincers, a latch normally retaining the lever, the said detector being provided with an arm abutting against the latch and releasing it by its swinging movement, the latch having a second arm, the said detector abutting by its returning movement against the second arm and forcing thereby the latch against and in engagement with the spring influenced lever, weights suspended from the threads guided in the box and adapted to release the latch, when the thread breaks.

In testimony whereof I afiix my signature in presence of two witnesses.

VVLADYSLAW KOZLOWSKI.

lVitnesses WAODAW SAKUBoWsKI, F. TREMBIETH.

Gopies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents, Washington, D. 0. 

